Well the ones that don't fall out are flattened against the case head.Not horrible, not flowing, no sign of gas leakage, no sign of bolt face print on the case head. When I initially worked the load up that is where I stopped and backed down a little. Then I fired the last match of the season with last year and I picked up quite a bit of brass with no primers.Of the 60 rounds I fired Sat. I lost no primers. I would like to sse how fast these are going compared to my Sierra manual before I make any other assumptions or problems for myself.